wolfram



June 9, 1925.

A. WOLFRAM MACHINE FOR MAKING NUTS 4 Sheets-Sheet 1 Filed April 18, 1924MT 0 R June 9, 1925.

A. WOLFRAM MACHINE FOR MAKING NUTS Filed April 18, 1924 4 SheetsSheet 2lN/f/NTOR June 9, 1925.

A. WOLFRAM MACHINE FOR MAKING NUTS Filed April 18, 1924 FIG. 4

4 Sheets-Sheet 3 INVENTOR WWW Aw? I I Patented Jame 9 7 UNITED STATESFF-I CE.

AN D'RERV WOLFRADI, OT PITTSBURGH, ANITA.

MACHINE non MAKING NUTS.

Application filed Ajmil -18, 1924. Serial N0. 707,376.

Milking Nuts; end I do hereby declare the i; i

owing "to be a full, clear and exact description thereof.

My i'nvcntionrelates to machines formal i11;:'nuts,and its generalobject is to provide a machine of simple and rugged construe tion whichshall operate rapidly and :automatically to produce finished nut blanksfrom cold stock, and shall include the verious mechanisms necessary forperforming the ()llGl'at lOllS of piercing, cutting, trimming, crowningand finishing.

More specifically,one object of my invention is'to provide-a machine formaking nuts wherein the punches which operate upon the blanks arearranged to move in a horizontal path and co-operate with dies havingtheir axes "horizontal so that the :hips pro duced at the dies will fallaway without cloggil'ig or otherwise interfering with the lies,andwithout the need for stock breakers interposed between the dies.

Another object of uny invention is to proride a machine for making" nutsin which the bar or strip "from which the nuts are to be made are fedinto the machine in a step by step ninn1'1er,'and is released by thefeeding: mechanism during the time when the punches engage 'the bar,thus permitting the bar to be l'JiOilBil) positioned with respect to thepunches without interference by the feeding mechanism.

A further object of my invention is to provide a machine for making nutshaving}, a safety device for throwing; the machine out of operation incase the nut blanks be come jammed in the dies.

A still further object of my invention is to provide a machine for mask1 nutshwvinn; two or more trinnning (lies, tl1euse of a pluralityof'trimniing dies being rendered possible by horizontal arrangement ofthe punches and dies, avhi'c'l'i prevents fouling of the dies with chipswhich"would-occur two or moretrimmingdies were placed one above theother.

A still further object of my invention is to providea novelfeedingn'iechanism which maybe thrown into and out of operationindependently of the automatic inoven'ient ofthe machine.

A still further object-of my invention to provide a novel mechanism fortransfer- ;ring blanks from one die to another.

Other objects and advantages of 'my vention will 'appear from thefollowing scription taken in connection with accompanying drawings, inwhich Fig. l is a plan yiew'showing the general construction of amachine constructed in accordance with my invention; Fig. 2 is a :sideelevational view of the same machine; Fig. 3 is *a partial side ele-i'ational view talieufromthe opposite side of the machine with respect toFig. 2; Fig. l is an enlarged plan view of the dies and the transfer"mechanism; Fig. 5 is an inverted sideelevationa'l vicwof the mechanismshown in Fig. 41-, as seen from the top of Fig. 4-; Fig. '6 is a sideelevational view of the transfer mechanism as seen from the right ofllig. 4; Fig. 7 is an enlarged plan view partly in section, of thefeeding mechanism and the dies; and Figs. 8 and 9 are details of theclutch mechanism between the driving gear and crank shaft of themachine.

The machine shown in the'drawing comprises a frame composed of sidemembers 2, an end member 8, a transverse die-supporting body i at theopposite-end of the machine frame and-supporting legs 5. A drive shaft 6is mounted in suitable bearings 7 in the ll'ltGlllllC fram'e alndcarries at'one'end a pulley S, which may be connected to any suitablesourceof power, not shown. The sha 'llt 6 carries at itsopposite endapinion '9 which lneshes with a spur :ge ar Wheel :10 that is mountedloosely on the projecting end of a main shaft 11, which is mounted inbearings l2 and 18011 the machine frame.

The 'nmi'nshaft 11 is provided between the bearings 12 and 18 with aneccentric portion which is enclosed Within a concentric hous- 'ing 14that is connected by means of a pitman to re-ciprocate a-punch slide l6which is mounted insuitalole guide "rays in themw chine frame, and whichis held in position in the guide ways by means of plates -17.

The end-of the main shaft 11 opposite to "the .gear wheel 10 is reducedin diameter and carriesa cam 18 for operating the transfer mechanism, acam 19 for operating the lateral stock feedennnd a cam 20 for operatingthe presser feet which forms :a part of the til) in operation.

feeding mechanism. The cams 18, 19 and 20 cooperate with cam rollers 21,22 and 23, re spectively, which are carried in forks formed at the endsof horizontal sliding bars 24, 25 and 26, that are mounted to slide infixed guide ways carried by brackets 27 and 28 extending laterally fromone of the side members 2 of the machine frame.

Feeding mechanism.

The feeding mechanism includes two main pressure members 30 and 31 whichperiodically clamp between them the bar 33 from which the ends are to beformed and advance this bar toward the dies in a step by step manner.Both of these pressure members are mounted to swing about a fixed pivot,and the member 30 is also given a movement toward and away from thestock so as to al ternately grip the stock and release it. The outerpressure bar 31 with its attachments is mounted upon a swinging member34 which, as best shown in Fig. 2, is offset between its ends and ispivotally mounted at its inner end upon a bolt 35, which is screwed upinto abracket 36 which is secured to one of the side members 2 of themachine frame by means of bolts 37. The bracket 36 also carries theguide ways for the cam bars 24, 25 and 26 described above. The swingingmember 34 is offset between its ends, as shown in Fig. 2, and its upperand outer portion rests slidably upon a bracket 38 which is secured tothe side of the machine frame by means of bolts 39. A spring 40 isconnected between the member 34 and an extension 41 of the bracket 38.

The swinging member 34 has an enlargement 45 in which is formed a recess46 covered by a stripper plate 47. Fitting loosely within the recess 46is a block 47 provided with recesses 48 in which are received springs 49that surround screws 50. These screws are extended into tapped openingsin the outer pressure member 31. The outer end of the block 47 restsagainst the rounded end of a pin 51 which extends through an opening inthe end of the enlargement 45 of the swinging member 34. The outer endof the pin 51 rests upon the spirally curved surface 52 of a cam member53 thatis mount ed pivotally on an extension 54 of the swing ing member34 and is provided with a handle 55. hen the handle 55 is in theposition shown in Figs. 1 and 7, the pressure of the springs 49 isrelieved from the presser block 31, and therefore the presser block 31does not clamp the stock bar 33. The stock will then not be fed into themachine even though the feeding mechanism is otherwise lVhen it isdesired to start the feeding mechanism, the handle 55 is turned to theright, as seen in Fig. 7, and the cam 53 then acts through the pin 51 tomove the block toward the presser block 31,

This movement is communicated through the springs 48 to resilientlyclamp the block 31 against the stock bar 33, this arrangement forming anautomatic trip by which the feed may be thrown into and out of operationwhenever desired.

The presser block 30 is secured removably by means of a set screw in theholder 56 which rests upon the upper surface of the swinging member 34,and is provided with a slot 57 surrounding a pin 58 which projectsupward from the member 34 and serves to guide the movement of the holder56. The holder 56 is pivotally secured at 59, Fig. 7, to the outer endof a horizontal bar 60, the opposite end of which is pivotally securedat 61, Fig. 1, to a coupling 62 of adjustable length, which in turn issecured to the slid ing bar 26, that is reciprocated, as stated above,by means of the cam 20, carried by the main shaft 11. This jointconnection between the holder 56 and the operating cam 20 permits theholder 56 to not only more toward and away from the stock bar 33, butalso to swing with the member 34. The holder 56 also has independentrocking movement around its pivotal connection 59 so as to accommodateitself to the surface of the stock bar during the sliding movement ofthe member 34. A spring 63 is connected between the pin 59 of the holder56 and a fixed pin 64 carried by the bracket 27. This spring tends tomove the holder 56 away from the stock bar 33 in opposition to the cam20.

The feeding movement of the presser block 30 is produced by means of acam 65 formed on the outer end of the bar 25 which is rcciprocated bymeans of the cam 19. The cam 65 engages a roller 66 arried by thepresser block holder 56. l v hen the cam bar 28 is forced to the left,Fig. 1, by the cam 19, the cam surface 65 acts through the roller 66 tomove the Dresser block holder 56 in the direction to feed thev stock 35bar into the machine. This movement cans the entire feeding mechanismcarried by the swinging member 34 to swing around the pivot of themember 34, thereby stretching the spring 49. retract the cam bar 65 whenthis bar released by the cam 1.9, and the spring -46 thereupon returnsthe swinging member 34 with its attachments until the roller 66 engagesa projection 68 upon the end of the cam bar 65.

In the operation of tho feedingmechanism just described, the trip handle55 is moved to the open position shown in the drawings, the stock bar 33is inserted between the presser blocks 30 and 31 and the handle isturned to clamp the presser block against the stock bar. Assuming thatthe main A spring 67 is connected to X shaft of the machine is now inoperation,

the cam 20 moves the bar 26 to the left,

Fig. 1, thereby clamping the 'prcsser block 1-30 against the stock bar,and thereupon the cam 19 unoves the-cam bar 2o to the left, as seen inFig. 1, thereby rocking the entire feeding devicearoundithe pivot o'lithe memher 34, thereby advaneing' the stock bar 33 to bring theend portion'o'l "the bar beneath the dies which are presentlyto be described itthis moment one o'fthe novel features of my invention comes into'p-l-iiypthis is the release of "the stock by the lei-fling mechanism"before the dies areoperating upon'tlic stock, after which the'pr'essei' block again engages the stock par and holds it "firmly whilethe dies are operating on the stock. For this purpose, the cam 20, whichcontrols the pressure of *the block upon the stock banis caused torelease-its pressureupon the 'am rollerQi-l momentarily and then toagain iorcethe presser block 30 against the stock bar. The contour ofthe cam 20, which produces this action, is seen in Fig. Q and *includesa concentric 'dwell which "permits the presser block to be retractedfrom the stock bar, a projecting" dwell which forces the presser blockagainst 'the stock bar during the initial feeding movement, a relieveddwell portion 72 WlHCll releases pressure upon the presser block whilethe'st'ock is being centered opposite to 'th'edies, and a secondprojecting dwell 73 which causes the presser block to clamp the stockbar during the operation of 'the punches.

While the stock bar is being advanced toward the dies, the 'prcss'erblocks SO untl 31 are moved in an arcuate path aroi'u'id the pivot ofthe swinging member 3 1. However, both of these blocks are able tomaintain their clamping surfaces in engagement with the straight sidesof the stock bar 33 since the presser block 30 is pivotully .n'nninitcdon the pin 59, while the opposite p'resser block 3 is resilientlyniounted on the springs 49.

The slide lfi'carries at its forward-end a punch block -75 which isadjustable verti- :n.lly, and carries a piercing punch 76 a roughingpunch 77, a crowning punch '78 and a trimming punch 5' 9, *thes'e"punches heinn' successively farther advanced from the face of the punchblock 75 as seen on Fig, 1 and 7.

()pposite to the piercing and roughing punches is a serieso'f diesincluding a die '80 having a round opening 81, 'an interme- (lia'toclieS2 'liaving'a liexagonalopening S3, and :1 third die 84 having ahexagonal opem ing 85. The dies 80, 82 and 8 1 are supported by suitablespacers 8G. The first die member isextended to a position opp0- site tothe piercing punch 76 and is there proi ided with an opening 87 to admitthe piercing punch 76. The metal punched from the stock bar 33 by thepiercing punch 76 is forced through the openii'ig 87 into a largeropening 88 "formed in the "block 89 whioh carries the (lies. This n-astemateria'l is able to fall freely out iii the n'iachine since theopening'88 is vertical. Similarly, the chips and waste pri'itluceul when theroughing die 77 cuts anv blanks i i-om the i loc :ba'r and '1or-':e's;lnblanks through the siuicessive dies 80. and 8 1, are able'to tallfont of the machine through the space ween the dies; Fouling of the diesby such chips and avaste is thereby preventml. The st'o'c'lchar 38 isguided 11.- the piercing and cnttin o position. a means of a plate 90which issecured'to the'die block 89 and is spaced therefrom centrally toadmit the stock-bar 83. The plate 00 has-an opening 91 0f proper size toadmit the piercing i'mne'h 76.

The blanks cut off successively from the stock bar 33 are forced oneafter another through the set oi' dies 80, 82and 84, each nut blankbeing pushed forward by the blanks which follow it. When each blankemerges from the 'die 8% it enters a slot 92 in th'e die block 89 and ispushed laterally into position 'opposite to a crowning die 93 by m'eansof a pusher rod 94, which foi'ms a part of the transfer mechanism whichwill be described below. In this position the blank is crowned b meansofthe crownin punch 78, being held at this time between upper and lowerguide strips 95 and 96. Another portion of the transfer m'eehanis'm thentransfers the crowned blank iii-om the crowning-die to a positionopposite to two or more finishing or trimming diesfli' and 98 which aresupported by su'itable spacers '99. The trimming punch 79 forces theblanks through the dies 9-7 "and 98, and the finished blanksemerge fromthe die 98 into a horizontal channel 100 in the die block 89 whichcommunicates with a similar channel 1.01 in the frame member 1- as seenin Fig. 1, and the finished nut blanks drop out of this channel into anysuitable receptacle.

Transfer mechanism.

The partially formed nut blanks are transferred in successlon from theroughing dies to the crowning die and thence to the trimming dies bymeans of a set or". transfer mechanism which is operated by a horizontalrod which is mounted slidably in bean bags 106 that are secured to thetop of the die block 89. The rod 105 is reciprocated lengthwise -bypower derived from the cam 18 on the main shaft 11 through the camroller 21, the sliding bar 241:,a cam member 107 carried by the bar 2 1,a horizontal bar 108 having a cam roller 105) engaging the cam 107, andhaving an enlarged end 110 engaging a roller 1'11 carried by a lever 112which is mounted on a fixed pivot 113, and is loosely pivoted at its endopposite to the roller 111 to one-endofthe rod 105. A spring tends toretract the cam member 107 in opposition to the cam 18, and a spring 116which is connected between the lever 112 and a fixed bracket 117 tendsto move the rod 105 to the position shown in Fig. 1, the action of thespring 116 being also in opposition to the cam 18. Through theseconnections the cam 18 moves the rod 105 to the left, as seen in Figs. 4and 5, and upwardly as seen in Fig. 1, while the spring 116 moves therod 105 in the opposite direction.

.A pusher rod 94 which, as stated above, pushes the partially formednuts from the roughing dies to the crowning die, is secured to the endof the rod 105 opposite to the lever 112 by means of a strap 120 havingeyes 121 and 122 formed in its opposite ends, and set screws 123 forsecuring the strap 120 to the rods 105 and 94, as best shown in Fig. 5.r

The mechanism which transfers the nuts from the crowning die to thetrimming or finishing dies, is best shown in Figs. 4, 5 and 6. Thismechanism includes an arm 125 which is pivotally mounted on a horizontalpin 126, the ends of which are secured in the parallel arms 127 of abracket 128, which is mounted slidably on the rectangular rod 105, andis secured in adjusted position thereon by means of a set screw 129. Thearm 125 carries at its lower end an enlarged finger 130 which'isprovided with a notch 131 for engaging the nut blanks. A'compress'ionspring 132 is connected between opposed recesses in the arm 125 and inthe bracket 128, and tends to maintain the arms 125 in the verticalposition shown in Fig. 6, this normal position of the arm 125 beingadjustable by means of a set screw 133, the end of which bears againstthe bracket 128.

hen the mechanism is in the position shown inverted in Fig. 5, the notch131 of the finger 130 is in position behind the crowning die 93, andwhen the rod 1.05 moves to the right as seen in Figs. 4 and 5, thefinger 130 of the arm 125 pushes the nut from the crowning die 93 to aposition above the trimming dies97 and 98. At the same time the nut ispushed from the roughing die to the crowning die by means of the pusherrod 94, and it is therefore necessary that the finger 1.30 be movedaside on its return stroke so as not to interfere with the nut that hasjust been. placed on the crowning die. For the purpose of deflecting thearm 125 at this time, the upper end of the arm 125 is provided with aprojecting pin 135, which moves adjacent to a deflecting cam 1.36 whichis mounted pivotally on a bolt 137 that is carried by the upperhorizontal arm of a stationary Z-bar 138. The cam 136 has a downwardlyextending wo king portion 139 which is provided at one end with aninclined projection 140 and is deflected at its opposite end, as shownat 141.

The cam is normally held in the position shown in Figs. 4 and 6 by meansof a spring 142 which is connected between stationary pin 143 on thebracket 138, and a pin 1'44. which is carried by the cam 136 andprojects upwardly through a slot 145 in the bracket 138, as shown inFig. 4. In this position of the cam 136 its outer edge rests flatagainst the front wall 146 of a recess 147 in the bracket 138, whichcontains the body of the cam 136. When the rod 105 moves to the right inFigs. 4 and 5, the pin 135 of the arm 125 engages the inclinedprojection 140 of the cam 136 and deflects the cam downwardly as seen inFig. 4, and to the left as seen in Fig. 6. As soon as the pin 135 passesthe projection 140, the cam 136 is returned to its normal position bythe spring 142. On the return stroke of the rod 105, the pin 135 engagesthe outer surface of the projection 140 of the cam 136 and is therebydeflected downwardly as seen in Fig. 4, and to the left as seen in Fig.6. This results in tilting the arm 125 around its pivot 126 in acounter-clockwise direction, as seen in Fig. 6, and the parts are soproportioned that this tilting of the rod 125 is sufficient to deflectthe finger 130 so that this linger passes the crowning die withouttoucl'iing the nut which has then been placed opposite to the crowningdie of the pusher finger 94.

The nuts are positioned properly opposite to the trimming dies 97 and 98by means of fingers 150 which are arranged on opposite sides of theopening of the trimming die 97, as best shown in Fig. 5, and are conneced by a spring 151 which. moves the ringers 150 to an extent limited byadjustable st..p screws 152 which are engaged by right angled extensions153 of the fingers 150.

The gear wheel 10, which is mounted loosely on the shaft- 11, isconnected to drive the shaft 11 through a key 155 which is adjustablymounted in recesses formed in the hub of the gear wheel 10 and in theadjacent enlarged portion 157 of the shaft 11. The key 155 is normallypressed by means of a spring 158 into the position in which i.) connectsthe gear wheel 10 to the shaft 11. The key 155 is also provided with aslot 150 having a beveled outer portion 160 which is adapted toco-operate with a similarly beveled portion 161. of a key drawer 162.key drawer is pivoted at 163 to a bra ket 164 which projects outwardlyfrom the side member 2 of the frame. A spring 65 is connected betweenthe key drawer 162 and a stationary pin 166 and tends to hold the keydrawer in the position shown in' Figs. 1 and 3, at which time the keydrawer 162 has entered the slot 159 and has withdrawn the key 155 fromengagement with the gear wheel 10, thereby compressing the spring 158. Arod 167 is pivotally connected at the one end Oi the key drawer 1 62 andis pivot-ally connected at its opposite end toa hori, zontal hand, lever168 which is supported pivotally on a pin lfiflcarriedliiy a, brzwket1'70 enter: ding outwardly iromthe lJQtllllGlilrher. The outeu portion,of the hand lover 168 is composed of two overlapping mem-v bers whichare connected together by means of a permanent bolt 1'71 ant i ashearing pin .172, as shown inljig. 1. Near i ts outeremlf the hnndlever168 is received in, an L-shaped. bracket til-lwhich has a ."GSS 17.l:ton held ing thelei r in the pot icon shown in tte lines in,lig 1.,whiclnis the position; 01 this lever when the machine is running. Thelever 168 is given suliicient vertical play to allow the leverto belifted from the notch 1174 when it is desired to stop, the machine, andwhen this isdo-ne, the spring 165 moves. the key drawer 162into the slotofthe key when the next revolution of the shaft 11 ln'ings the bevelednotch ot the key into engagement with the beveled endof the key drawer.

It it should] happen that the nut blanks should be improperly delivered;from the roughing dies. so as not to, be transferred properly by thepusher rod 94, the thrust or the in'l-properly delivered nut will" beexer ted, against the end of, a horizontal rod 175 which extends fromthe roughing dieszto a position oppositeto that portion of; the hand,lever 168 which carries the, shearing pin 172. It will be seen on Fig. 1that the outer end of the rod 175 is closely adjacent to the lever 168when the lever isinitsdotted line or running position. If therod 175 isforced outwardly by the improper deliv cry or: blanks. from the roughingdies, this n'iovement shears oi'ii the shearing pin, 172; and permitsthe spring 165 to move the. key drawer into position to stop the machinein the same manner as when. the lever is moved from the dotted positionin Fig; l to the fullline position, This arrangement provides a, safetydevice for insuring that the machine will; not be damaged through theimproper delivery 01 blanks in the roughing dies.

I have shown and described in detail a construction of a machinewhiclris; well adaptedi'or carrying out my invention. will be understood,however, that various changes in the construction and arrange ment ofparts may be made without departing from my invention as set forth inthe appended claims.

I claim as my invention:

1. Feeding mechanism for nut making machines comprising a pair ofclamping members adapted to grip a stock bar between them, automaticmeans for reciprocating one of said clamping members toward and from theother, automatic means for swinging said clamping members around a fixedaxis to advance said stock bar, and means for permitting saidclampingmembers to move about individual axesto maintain alignment with saidstock bar duringsaid swinging, movement.

2. Feeding mechanism for nut making machines, comprising a supportinmember adapted to oscillate on a fixed; pivot, a spring tending to holdsaid supporting member in; one position, cam op ated means for movingsaid supporting, member in the opposite direction, a pair of clampingmemberscan ried by said supporting member, automatic means forreciprocating one 0t said clamping members toward and from clamping position, spring means for resilientlyholding the other in engagement withthe stock-bar, and a manually operable cam for throwing the last-namedclamping member into and out of operation.

3. Feeding mechanism for nut making machines comprising a supportingmember adapted to oscillate upon fixed pivot, a pair of clamping,members carried by said supporting member, a springtending to. hold saidsupporting member in one posi tion, cam operated means for movin saidsupporting member to advance a stoc k bar clamped between said clampingmembers, automatic means for moving one of: said clamping members,toward and away from the other, springs fior resiliently pressing the.second clamping member toward the other, and means for permitting saidclampirm'r members to attach. themselves to, the said stock bar whilesaid clamping, members are.

advancing said stock bar.

4:. Feeding mechanism for nut making machinescomprising a pair ofclamping members adapted to grip ancl iadvance a stock bar, a set ofdies and: punches, and means for actuating said: clamping members toadvance said stock bar to said dies and punches, the said'advancing.means being arranged to release the stock. bar after said: stock bar isadvanced to said dies and punches, and then to again grip, said stockbar while said dies and punches are operating upon said stock bar.

5. Feeding mechanism for nut making machines comprising a supportingmember adapted to oscillate on a vertical; axis, clamping member, aholder for said clamp ing member mounted slidably and pivotally on saidsupporting; member, cam-operated means for forcing said holder in onedirection, a spring for retracting said holder in the oppositedirection, a cam for moving said holder horizontally and for therebyswinging the said supporting member upon its vertical axis, a secondclamping member also carried by said supporting member, springs foryieldingly forcing said secondnamed clamping member toward saidfirstnanied clamping member, a block carrying said springs, a horizontalpin engaging said lll block, and a manually operable cam engaging saidpin and adapted to move said pin lengthwise toward said clampingmembers, and thereby to force said second-named clamping member towardsaid first-named clamping member.

6. A machine for making nuts comprising roughing, crowning and trimmingdies, transfer mechanism for moving nut blanks between said dies,comprising a pusher rod movable in a channel between said roughing diesand said crowning die, a shifting linger movable between said crowningdies and adapted to push nut blanks from said crowning die to saidtrimming dies, and means for deflecting said finger on its returnmovement past said crowning die.

7. A machine for making nuts comprising a set of roughing, crowning andtrimming dies, a pusher rod for transferring nut blanks between saidroughing and crowning dies, a' reciprocating bar supporting said pusherrod, a transfer finger also carried by said bar, and means fordeflecting said transfer while said transfer linger is passing saidcrowning die in one direction, the said deflecting means comprising acam pivotally mounted in the path of movement of'said finger, a springnormally holding said cam in position to engage and deflect said finger,and means carried by said finger for engaging and pushing aside said camwhen said finger is moving in one direction, and for engaging said camand deflecting said finger when said finger is moved in the oppositedirection.

8. A machine for making nuts comprising a set of dies arranged in linewith one another, a punch co-operating with said dies, a rodlongitudinally movable in an opening arranged in line with the openingsin said dies, a lever operably connected to control the movement of themachine, and a shearing pin arranged to be sheared by engagement withsaid lever.

9. A machine for making nuts comprising a set of roughing dies disposedin axial alignment, a crowning die spaced transversely of said roughingdies, and a plurality of trimming dies spaced transversely of thecrowning die and axially of the roughing dies.

ineinis 10. A machine for making nuts comprising a set of roughing diesand a plurality of trimming dies, and means for transferring a blankfrom one set of dies to the other set, the dies of each group beingarranged in horizontal alignment, and each group being spaced in adirection axially of the other group.

11. A machine for making nuts comprising a set of roughing dies and aplurality of trimming dies, and means for transferring a blank from oneset of dies to the other set, the dies of each group being arranged inhorizontal alignment and each group being s aced in a direction radiallyand axially of t e other group.

12. A machine for making nuts comprising a set of punches arranged toreciprocate horizontally, and a set of dies arranged to co-operate withthe said punches, the said dies including a piercing die, a plurality ofspaced roughing dies arranged in horizontal alignment with each other, acrowning die, a plurality of spaced trimming dies arranged in horizontalalignment with each other and offset in directions radially and axiallyof the roughing dies, and means for transfer ring blanks to said sets ofdies successively.

13. Feeding mechanism for nut making machines comprising a framepivotally mounted upon a fixed axis, means for imparting intermittentoscillatory motion to said frame, clamping members adapted to clamp, astock bar between them, automatic means for moving one of said clampingmembers toward and away from the other clamping member while said frameis at rest, and automatic means for moving said oscillating frame toadvance said stock bar when said clamping members are in clampingengagement with said stock bar.

14. Feeding mechanism for nut making machines comprising a movableframe, means for imparting intermittent advancing movements to saidframe, stock bar clamping members on said frame, and means for operatingsaid clamping members to temporarily release the bar when said frame isat rest during periods between said movements.

In testimony whereof I, the said Annnmv WOLFRAM, have hereunto set myhand.

ANDREW VVOLFRAh l.

